Can the AVM 6.2 or Pass INT-60 replace my LM845P?

The 8.3 will be sweeter.  You will get a flavor for the sound but it will sound more tube-like than the 6.2 ME.  I had the 8.3 monos here and they could be mistaken for a KT88 based amp.  Not sure the 6.2 ME is quite that nice.

I have a suggestion for you to look into as a potential new option. The integrated amplifier is made by a company called Circle Labs. The A200. It is a hybrid integrated amplifier with a tube preamplifier linked to a class A single ended, solid state output.

This unit is all about tone. Very open and beautiful sounding. Gobs of detail presented in a very life like and natural manner.

Colin of Gestalt Audio Design in Nashville is the dealer/importer. Very special unit. Only two small signal tubes in the preamp circuit that are not costly and last 10,000 hours.

Innovative circuit design with short signal paths, minimal number of parts and a robust power supply.

It delivers the kind of sound you may prefer based on your post. Great for low level listening as the music’s sonic nuances still come through.

I use a pair of Schiit Aegirs with my Tekton 2-10 Perfect Sets.  It’s a match made in heaven and very reasonably priced for what you get.  The amps have a standby mode so they are always warmed up.  Sounds like the best qualities of tubes blended with the best of SS.

Should sound even better with the DI’s.

Qualifier - I use silver speaker cable with them.  Don’t go cheap there for best SQ.

I just took delivery of the AVM SA8.2 and I have to say it sounds very very good with my Focal Sopra 3’s. The bass is very tight and punchy and the mids and highs are transparent but not fatiguing. Was previously using the Anthem STR integrated amp. I’m sure the 6.2ME will have a similar sound character. Also the build quality is absolutely amazing.